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(No Model.) 2 Sheets-Sheet 2.- B. J. MASSBRON.

' ALARM LOCK.

Patented June 12, 1883.

JN VENTR WIT/@55565 UNITED STATES PATENT 4OEEICE.

EDOUARD J. MASSERON, OF PARIS, FRANCE.

ALARM-LOCK.

SPECIFICATION forming part of Letters Patent No. 279,409, dated J' une 12, 1883.

Application lcd December 4, 1882. (No model.) Patented in France July 1B, 1882, No. 150,155 3 in England October 2'?, 1882, No. 5,124 in Austria October 28, 1882, and in Germany October 30, 1882.

To all whom it may concern.-

Be it known that I, EDOUARD JULIEN MnssERoN, a citizen of the Republic of France, and a resident of Paris, France, have invented certain Improvements in Alarm- Gong-s (for which I have obtained a French patent dated July 18, 1882, No. 150,155; British Patent No. 5,124, dated October 27, 1882; Austrian patent dated October 28, 1882, and German patent dated October 40, 1882,) of which the following is a specication.

My invention relates more particularly to Athat class of alarm-gongs in which the bellstriking devices are connected to oroperated by the bolt or latch mechanism of a door; and the object of my invention is to combine with such mechanism simple devices for obtaining a succession of rapidly-repeated strokes on the bell without the useof a spring or clock striking` mechanism, as more fully described hereinafter.

In the accompanying drawings, Figure 1 is a view representing my improvements applied to a door, in connection with the latch or bolt; Fig. 2, acorresponding plan view; and Fig. 3 a perspective viewof the striking-ham mer and its pinion, drawn to an enlarged scale.

S is the door-lock, and O the bolt or latch, to be withdrawn into the lock by a suitable handle to open the door, and provided with a spring to throw the bolt outward again whenV the handle is released.

To the rear end of the bolt I secure an ex` tension, o, and connect to the latter a link, b, pivoted in turn to a crank or arm, u, on the spindle of a wheel, 3, gearing into a pinion, 2, carrying a wheel, 1, gearing into a pinion, r, on aspindle, o, Fig. 3. On this spindle o is secured a piece, p, to which is pivoted the hammer m to strike the bell T. (Indicated by dotted lines in Figs. 1 and 2.) rIlhe gearwheels and hammer are mounted on a plate or frame within the bell T, secured to the door, and these striking devices, with the bell, may be arranged at any convenient point-as, for instance, at the p oint {FL-instead of that described above,the connection` being through alink, When the bolt is drawn back to open the door, and also on its return to its normal position, the rectilinear movement of the bolt is changed through the gearing into a continuous rotary motion in one direction or the other, and the gear-wheels and pinions areof such relative sizes that each movement of the bolt will cause a number of rapid revolutions to be imparted to pinion r, so that the hammer m will strike the bell an equal number of times. By this means each time the door is opened the gong will be sounded, and, as I have above indicated, this occurs both on the shooting and withdrawal of the bolt or catch.

It may be desirable in some cases to temporarily throw the gong out of action, for which purpose a hook or other coupling may be used at any suitable point to break the connection. For instance, the link b may be disconnected from the piece c and allowed to drop into the position indicated by dotted lines in Fig. 1.

I claim as my invention- The combination of the sliding bolt O, connecting-rod b, and crank n, with multiplyinggear, pinion 1', piece p, and pivoted hammer, substantially as set forth.

In testimony whereof I have signed my name to this specification inthe presence of two subscribing witnesses. EDOUARD JULIEN 'MASSERON Witnesses:

ALFRED COINY,

ROBT. M. HoorER. 

